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Water myths

Posted on 4th April, 2008 by Heather

Make sure to breathe 17,280 times a day. It’s for the good of your health. Don’t forget to take those breaths or your health will suffer.

:-)

OK, there’s no guidance yet on how much air you should breathe. Maybe that’s just because nobody has worked out how to sell air yet. Not so for water. How many times have you heard that you should drink x amount of water a day? You might have even heard that tea, coffee, soft drinks, beer and wine somehow don’t count as containing water. It’s not just the Penelope Keiths either. Even the respectable and respected nutrition advisers seem to give out this tosh. The Food Standards Agency, for instance, presents a sanitised version of the “other drinks may not count” argument.

The British Nutrition Foundation cites unspecified authorities to recommend an amount. More crucially, it says thirst doesn’t tell you when you need water.

Health professionals recommend at least 1.5 to 2 litres (6-8 cups) of liquids a day in temperate climates. The sensation of thirst is not triggered until there is already a water deficit, so it is important to drink before you get thirsty.

So, it’s pleasant to see a public debunking of the “drink 2 litres of water a day myth”. A Penn U study showed that there was no health benefit to drinking extra water.

You don’t get much more of an insistent human drive than thirst. So why do we have so many “experts” telling us that thirst isn’t a good guide to needing water? We may be bad at letting our hunger tell us when to eat. But thirst is pretty basic.

There are a very few circumstances (e.g. heat stroke if you’ve suddenly moved from winter Finland to summer Malaysia) in which your own thirst isn’t a good guide to how much you should drink.

(In any case, I wonder how anyone could drink as little as 2 litres of water-based fluid a day. I’ve had that before lunchtime, if coffee counts.)

Popularity: 18% [?]


Popularity: 18% [?]

Healthy Eating

Posted on 8th May, 2007 by TW

This is not normally a topic I would stray into, but as Heather is hors de combat for a while, I thought I would give it a shot. It certainly strikes me as “bad science” but I may be wrong…

Given the way the UK has got on board this “healthy eating” campaign, it is not surprising that the supermarkets have pulled out all the plugs to use this woo to sell more products. On a fairly regular basis there are adverts on TV how this product or that product is “one of your five a day” with minimal reason behind the claims. It seems Sainsbury’s (supermarket chain) has joined in and in their infinite wisdom have decided that telling their customers how many grams of fat, carbohydrates/sugar, protein etc., are in their food is not effective. As part of the great dumbing down of the UK they now use a “traffic light” system. It is pretty embarrassing.

Sainsburys Cheese Ploughmans PackagingWhat intrigues me the most, is the apparently arbitrary nature of what gets a “green” compared to what gets an “amber” or “red” (I am assuming Green = Good and Red = Bad by the way, can food be “Bad?”). As a recent example, I bought a Sainsbury’s Cheese Ploughmans ready made sandwich which comes on malted bread with “seeds.” The packaging calls it “reduced fat, a healthier option.” In the picture, you can see what the traffic light system looks like, but please note, the fat and salt are supposed to be “amber” rather than red.

Popularity: 35% [?]


Popularity: 35% [?]